Pulled PTU out today and tore apart. Everything looks good inside except the race the idler shaft rests in is wore oblong, one side looks good, the opposite is razor thin. The idler shaft also has about a 1/4 to 1/2 mill deep on one side with putting in the groove, other half of the shaft is clean no damage. I’m guessing it was causing the gears to bind but I don’t know for sure.